clear,clc;
A=1:24;
B=randperm(24);
A1=A(B(1:4)')
A(B(1:4))=[];B2=randperm(20);
A2=A(B2(1:4)')
A(B2(1:4))=[];B3=randperm(16);
A3=A(B3(1:4)')
A(B3(1:4))=[];B4=randperm(12);
A4=A(B4(1:4)')
A(B4(1:4))=[];B5=randperm(8);
A5=A(B4(1:4)')
A(B5(1:4)')=[];
A6=A
